Martial Arts DVD Videos Tonfa. Originally adapted from an Okinawan farm implement, martial artists throughout the world now use the tonfa as a weapon. Even law enforcement agencies use the tonfa as a replacement for the standard baton. Indeed, kobudo - practicing with ancient weapons is now an established art that can be practiced by men, women and children for defense as well as performing kata (techniques) in their martial art. In this DVD, Demura teaches proper grips, strikes, stances, defense moves, attacks and other techniques that will improve your overall skill and coordination using the tonfa.